/*
 * This software code is (c) 2010 T-Mobile USA, Inc. All Rights Reserved.
 *
 * Unauthorized redistribution or further use of this material is
 * prohibited without the express permission of T-Mobile USA, Inc. and
 * will be prosecuted to the fullest extent of the law.
 *
 * Removal or modification of these Terms and Conditions from the source
 * or binary code of this software is prohibited.  In the event that
 * redistribution of the source or binary code for this software is
 * approved by T-Mobile USA, Inc., these Terms and Conditions and the
 * above copyright notice must be reproduced in their entirety and in all
 * circumstances.
 *
 * No name or trademarks of T-Mobile USA, Inc., or of its parent company,
 * Deutsche Telekom AG or any Deutsche Telekom or T-Mobile entity, may be
 * used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" AND "WITH ALL FAULTS" BASIS
 * AND WITHOUT WARRANTIES OF ANY KIND.  ALL EXPRESS OR IMPLIED
 * CONDITIONS, REPRESENTATIONS OR WARRANTIES, INCLUDING ANY IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT CONCERNING THIS SOFTWARE, ITS SOURCE OR BINARY CODE
 * OR ANY DERIVATIVES THEREOF ARE HEREBY EXCLUDED.  T-MOBILE USA, INC.
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE
 * OR ITS DERIVATIVES.  IN NO EVENT WILL T-MOBILE USA, INC. OR ITS
 * LICENSORS BE LIABLE FOR LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES,
 * HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT
 * OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF T-MOBILE USA,
 * INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * THESE TERMS AND CONDITIONS APPLY SOLELY AND EXCLUSIVELY TO THE USE,
 * MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE, ITS SOURCE OR BINARY
 * CODE OR ANY DERIVATIVES THEREOF, AND ARE SEPARATE FROM ANY WRITTEN
 * WARRANTY THAT MAY BE PROVIDED WITH A DEVICE YOU PURCHASE FROM T-MOBILE
 * USA, INC., AND TO THE EXTENT PERMITTED BY LAW.
 */

package javax.microedition.ims.android.core.media;

import android.os.Parcel;

import java.util.Map;
import java.util.Set;

public final class ParcelUtils {
    private ParcelUtils() {
        assert false;
    }

    public static <K, V> void writeMap(Map<K, V> map, Parcel dest,
                                       ParcelMapWriter<K, V> mapWriter) {
        if (map == null) {
            dest.writeInt(0);
        }
        else {
            Set<Map.Entry<K, V>> entries = map.entrySet();
            dest.writeInt(entries.size());
            for (Map.Entry<K, V> e : entries) {
                mapWriter.writeKey(dest, e.getKey());
                mapWriter.writeValue(dest, e.getValue());
            }
        }
    }

    public static <K, V> void readMap(Map<K, V> map, Parcel src,
                                      ParcelMapReader<K, V> mapReader) {
        int size = src.readInt();
        for (int i = 0; i < size; i++) {
            K key = mapReader.readKey(src);
            V value = mapReader.readValue(src);
            map.put(key, value);
        }
    }

    static interface ParcelMapWriter<K, V> {
        void writeKey(Parcel parcel, K value);

        void writeValue(Parcel parcel, V value);
    }

    static interface ParcelMapReader<K, V> {
        K readKey(Parcel parcel);

        V readValue(Parcel parcel);
    }
}
